Compressed filesystem on CF cards --> faster boot ?

  • Thread starter Thread starter Thomas Johansen
  • Start date Start date
T

Thomas Johansen

Hi

Maybe it has been discussed before, but I have tried searching this
group.....

But is the idea, that boot time will be reduced, when compressed filesystem
is used on CF cards ??
I mean, the CF card is possible the bottle neck when the system boots, so if
the filesystem is compressed, the amount of data, that must be read from the
CF card is less, then if its not compressed ??? ... or is this not he case ?

/Thomas
 
Thomas,

Although your idea is valid and you may gain some performance increase by going with compressed FS, in general it depends on your
hardware performance. With compresses FS you are easting up much CPU cycles so it may even slow down the device. If the CF is really
really slow, then some performance improve may be felt there.

However, this is all gets more complicated (or more simple, depending on how to look at it) if you use EWF. You'd probably gain much
more if you use EWF RAM overlay. All write cycles would be redirected to RAM which is obviously faster than any possible CF.
The same time compressing flag may not make much sense with EWF ON.

If you don't use EWF then you may end up with damaged CF really quick.
 
KM

I understand.... It eats alot of CPU cycler, but allso it depends on how the
system is used.? I my case, the OS is launched, then our application is
launched.. The application it self has minimum disk write needs.
I am using high quality CF card and EWF and the boot time isn't so big a
deal. It was just a thought on how rhe boot time could be minimized...
So if the system has plenty of CPU power, then there probaly would be some
performance gain, using compressed FS ??.. (Ofcourse if the the CPU power
isn't needed else where)

Thomas

KM said:
Thomas,

Although your idea is valid and you may gain some performance increase by
Click to expand...
going with compressed FS, in general it depends on your
hardware performance. With compresses FS you are easting up much CPU
Click to expand...
cycles so it may even slow down the device. If the CF is really
really slow, then some performance improve may be felt there.

However, this is all gets more complicated (or more simple, depending on
Click to expand...
how to look at it) if you use EWF. You'd probably gain much
more if you use EWF RAM overlay. All write cycles would be redirected to
Click to expand...
RAM which is obviously faster than any possible CF.
 
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